refactor: Use C18 features

runtime/Makefile

@@ -7,7 +7,7 @@ endif
 
 # Compiler Settings
 CC=clang
-CC_OPTIONS = -O3 -flto -g -pthread -D_GNU_SOURCE
+CC_OPTIONS = -O3 -flto -g -pthread -D_GNU_SOURCE -std=c18
 
 # CC_OPTIONS for Debugging
 # CC_OPTIONS = -O0 -g -pthread -D_GNU_SOURCE

runtime/include/arch/aarch64/context.h

@@ -79,7 +79,7 @@ arch_context_switch(struct arch_context *a, struct arch_context *b)
 	reg_t *a_registers = a->regs, *b_registers = b->regs;
 	assert(a_registers && b_registers);
 
-	asm volatile("mov x0, sp\n\t"
+	__asm__ volatile("mov x0, sp\n\t"
 	                 "adr x1, reset%=\n\t"
 	                 "str x1, [%[a], 8]\n\t"
 	                 "str x0, [%[a]]\n\t"
@@ -103,9 +103,9 @@ arch_context_switch(struct arch_context *a, struct arch_context *b)
 	                 :
 	                 : [a] "r"(a_registers), [b] "r"(b_registers), [av] "r"(&a->variant), [bv] "r"(&b->variant),
 	                   [slowpath] "r"(&arch_context_restore_preempted)
-	             : "memory", "cc", "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x8", "x9", "x10", "x11", "x12",
-	               "x13", "x14", "x15", "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", "x24", "d8", "d9",
-	               "d10", "d11", "d12", "d13", "d14", "d15");
+	                 : "memory", "cc", "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x8", "x9", "x10", "x11",
+	                   "x12", "x13", "x14", "x15", "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", "x24",
+	                   "d8", "d9", "d10", "d11", "d12", "d13", "d14", "d15");
 
 	return 0;
 }

runtime/include/arch/common.h

@@ -3,6 +3,7 @@
 #include <assert.h>
 #include <stdbool.h>
 #include <stdint.h>
+#include <stdnoreturn.h>
 #include <string.h>
 #include <ucontext.h>
 #include <unistd.h>
@@ -30,4 +31,4 @@
  */
 
 /* Cannot be inlined because called in assembly */
-void __attribute__((noinline)) __attribute__((noreturn)) arch_context_restore_preempted(void);
+noreturn void __attribute__((noinline)) arch_context_restore_preempted(void);

runtime/include/arch/x86_64/context.h

@@ -31,7 +31,7 @@ arch_context_init(struct arch_context *actx, reg_t ip, reg_t sp)
 		 * to push the stack pointer sp to the top of its own stack.
 		 * This acts as the base pointer
 		 */
-		asm volatile("movq %%rsp, %%rbx\n\t" /* Temporarily save pointer of active stack to B */
+		__asm__ volatile("movq %%rsp, %%rbx\n\t" /* Temporarily save pointer of active stack to B */
 		                 "movq %%rax, %%rsp\n\t" /* Set active stack to stack pointer in A(C variable sp) */
 		                 "pushq %%rax\n\t"       /* Push A register (C variable sp) onto the stack at sp */
 		                 "movq %%rsp, %%rax\n\t" /* Write the incremented stack pointer to A(C variable sp) */
@@ -109,7 +109,7 @@ arch_context_switch(struct arch_context *a, struct arch_context *b)
 	reg_t *a_registers = a->regs, *b_registers = b->regs;
 	assert(a_registers && b_registers);
 
-	asm volatile(
+	__asm__ volatile(
 	  /* Create a new stack frame */
 	  "pushq %%rbp\n\t"       /*  stack[stack_len++] = base_pointer */
 	  "movq %%rsp, %%rbp\n\t" /*  base_pointer = stack_pointer. Start new Frame */

runtime/include/current_sandbox.h

@@ -1,11 +1,13 @@
 #pragma once
 
+#include <threads.h>
+
 #include "sandbox_types.h"
 
 /* current sandbox that is active.. */
-extern __thread struct sandbox *worker_thread_current_sandbox;
+extern thread_local struct sandbox *worker_thread_current_sandbox;
 
-extern __thread struct sandbox_context_cache local_sandbox_context_cache;
+extern thread_local struct sandbox_context_cache local_sandbox_context_cache;
 
 void current_sandbox_start(void);
 

runtime/include/generic_thread.h

@@ -1,10 +1,11 @@
 #pragma once
 
 #include <stdint.h>
+#include <threads.h>
 
-extern __thread uint64_t generic_thread_lock_duration;
-extern __thread uint64_t generic_thread_lock_longest;
-extern __thread uint64_t generic_thread_start_timestamp;
+extern thread_local uint64_t generic_thread_lock_duration;
+extern thread_local uint64_t generic_thread_lock_longest;
+extern thread_local uint64_t generic_thread_start_timestamp;
 
 void generic_thread_dump_lock_overhead(void);
 void generic_thread_initialize(void);

runtime/include/listener_thread.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <stdbool.h>
+#include <stdnoreturn.h>
 
 #include "generic_thread.h"
 #include "module.h"
@@ -10,7 +11,7 @@
 extern pthread_t listener_thread_id;
 
 void           listener_thread_initialize(void);
-__attribute__((noreturn)) void *listener_thread_main(void *dummy);
+noreturn void *listener_thread_main(void *dummy);
 int            listener_thread_register_module(struct module *mod);
 
 /**

runtime/include/software_interrupt.h

@@ -8,6 +8,7 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <threads.h>
 
 #include "debuglog.h"
 #include "runtime.h"
@@ -17,7 +18,7 @@
  * Externs  *
  ***********/
 
-extern _Atomic __thread volatile sig_atomic_t software_interrupt_deferred_sigalrm;
+extern _Atomic thread_local volatile sig_atomic_t software_interrupt_deferred_sigalrm;
 extern _Atomic volatile sig_atomic_t *            software_interrupt_deferred_sigalrm_max;
 
 /*************************

runtime/include/types.h

@@ -2,6 +2,7 @@
 
 #include <stdint.h>
 #include <stdio.h>
+#include <threads.h>
 
 #include "wasm_types.h"
 
@@ -33,4 +34,4 @@ struct sandbox_context_cache {
 	struct indirect_table_entry *module_indirect_table;
 };
 
-extern __thread struct sandbox_context_cache local_sandbox_context_cache;
+extern thread_local struct sandbox_context_cache local_sandbox_context_cache;

runtime/include/worker_thread.h

@@ -1,11 +1,13 @@
 #pragma once
 
+#include <threads.h>
+
 #include "generic_thread.h"
 #include "runtime.h"
 
-extern __thread struct arch_context worker_thread_base_context;
-extern __thread int                 worker_thread_epoll_file_descriptor;
-extern __thread int                 worker_thread_idx;
+extern thread_local struct arch_context worker_thread_base_context;
+extern thread_local int                 worker_thread_epoll_file_descriptor;
+extern thread_local int                 worker_thread_idx;
 
 void *worker_thread_main(void *return_code);
 

runtime/src/arch/aarch64/env.c

@@ -6,7 +6,7 @@ unsigned long long int
 __getcycles(void)
 {
 	unsigned long long virtual_timer_value;
-	asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
+	__asm__ volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
 	return virtual_timer_value;
 }
 

runtime/src/arch_context.c

@@ -2,6 +2,7 @@
 #include <signal.h>
 #include <stdbool.h>
 #include <stdlib.h>
+#include <stdnoreturn.h>
 
 #include "panic.h"
 
@@ -11,7 +12,7 @@
  * then update the registers we should return to, then sigreturn (by returning from the handler). This returns to the
  * control flow restored from the mcontext
  */
-void __attribute__((noinline)) __attribute__((noreturn)) arch_context_restore_preempted(void)
+noreturn void __attribute__((noinline)) arch_context_restore_preempted(void)
 {
 	pthread_kill(pthread_self(), SIGUSR1);
 	panic("Unexpectedly reached code after sending self SIGUSR1\n");

runtime/src/current_sandbox.c

@@ -1,3 +1,5 @@
+#include <threads.h>
+
 #include "current_sandbox.h"
 #include "sandbox_functions.h"
 #include "sandbox_receive_request.h"
@@ -8,9 +10,9 @@
 #include "scheduler.h"
 #include "software_interrupt.h"
 
-__thread struct sandbox *worker_thread_current_sandbox = NULL;
+thread_local struct sandbox *worker_thread_current_sandbox = NULL;
 
-__thread struct sandbox_context_cache local_sandbox_context_cache = {
+thread_local struct sandbox_context_cache local_sandbox_context_cache = {
 	.memory = {
 		.start = NULL,
 		.size = 0,

runtime/src/generic_thread.c

@@ -1,13 +1,14 @@
 #include <stdint.h>
+#include <threads.h>
 
 #include "arch/getcycles.h"
 #include "debuglog.h"
 
 /* Implemented by listener and workers */
 
-__thread uint64_t generic_thread_lock_duration   = 0;
-__thread uint64_t generic_thread_lock_longest    = 0;
-__thread uint64_t generic_thread_start_timestamp = 0;
+thread_local uint64_t generic_thread_lock_duration   = 0;
+thread_local uint64_t generic_thread_lock_longest    = 0;
+thread_local uint64_t generic_thread_start_timestamp = 0;
 
 void
 generic_thread_initialize()

runtime/src/global_request_scheduler.c

@@ -1,20 +1,22 @@
+#include <stdnoreturn.h>
+
 #include "global_request_scheduler.h"
 #include "panic.h"
 
 /* Default uninitialized implementations of the polymorphic interface */
-__attribute__((noreturn)) static struct sandbox_request *
+noreturn static struct sandbox_request *
 uninitialized_add(void *arg)
 {
 	panic("Global Request Scheduler Add was called before initialization\n");
 }
 
-__attribute__((noreturn)) static int
+noreturn static int
 uninitialized_remove(struct sandbox_request **arg)
 {
 	panic("Global Request Scheduler Remove was called before initialization\n");
 }
 
-__attribute__((noreturn)) static uint64_t
+noreturn static uint64_t
 uninitialized_peek()
 {
 	panic("Global Request Scheduler Peek was called before initialization\n");

runtime/src/listener_thread.c

@@ -73,7 +73,7 @@ listener_thread_register_module(struct module *mod)
  * listener_thread_epoll_file_descriptor - the epoll file descriptor
  *
  */
-__attribute__((noreturn)) void *
+noreturn void *
 listener_thread_main(void *dummy)
 {
 	struct epoll_event epoll_events[RUNTIME_MAX_EPOLL_EVENTS];

runtime/src/local_completion_queue.c

@@ -1,7 +1,9 @@
+#include <threads.h>
+
 #include "local_completion_queue.h"
 #include "sandbox_functions.h"
 
-__thread static struct ps_list_head local_completion_queue;
+thread_local static struct ps_list_head local_completion_queue;
 
 
 void

runtime/src/local_runqueue.c

@@ -2,13 +2,14 @@
 #ifdef LOG_LOCAL_RUNQUEUE
 #include <stdint.h>
 #endif
+#include <threads.h>
 
 #include "local_runqueue.h"
 
 static struct local_runqueue_config local_runqueue;
 
 #ifdef LOG_LOCAL_RUNQUEUE
-__thread uint32_t local_runqueue_count = 0;
+thread_local uint32_t local_runqueue_count = 0;
 #endif
 
 /* Initializes a concrete implementation of the sandbox request scheduler interface */

runtime/src/local_runqueue_list.c

@@ -1,3 +1,5 @@
+#include <threads.h>
+
 #include "client_socket.h"
 #include "current_sandbox.h"
 #include "global_request_scheduler.h"
@@ -5,7 +7,7 @@
 #include "local_runqueue.h"
 #include "sandbox_functions.h"
 
-__thread static struct ps_list_head local_runqueue_list;
+thread_local static struct ps_list_head local_runqueue_list;
 
 bool
 local_runqueue_list_is_empty()

runtime/src/local_runqueue_minheap.c

@@ -1,4 +1,5 @@
 #include <stdint.h>
+#include <threads.h>
 
 #include "arch/context.h"
 #include "client_socket.h"
@@ -12,7 +13,7 @@
 #include "sandbox_functions.h"
 #include "runtime.h"
 
-__thread static struct priority_queue *local_runqueue_minheap;
+thread_local static struct priority_queue *local_runqueue_minheap;
 
 /**
  * Checks if the run queue is empty

runtime/src/software_interrupt.c

@@ -5,6 +5,7 @@
 #include <string.h>
 #include <stdint.h>
 #include <stdlib.h>
+#include <threads.h>
 #include <unistd.h>
 #include <ucontext.h>
 
@@ -31,11 +32,11 @@ static uint64_t software_interrupt_interval_duration_in_cycles;
  * Thread Globals *
  *****************/
 
-__thread _Atomic static volatile sig_atomic_t software_interrupt_SIGALRM_kernel_count = 0;
-__thread _Atomic static volatile sig_atomic_t software_interrupt_SIGALRM_thread_count = 0;
-__thread _Atomic static volatile sig_atomic_t software_interrupt_SIGUSR_count         = 0;
-__thread _Atomic volatile sig_atomic_t        software_interrupt_deferred_sigalrm     = 0;
-__thread _Atomic volatile sig_atomic_t        software_interrupt_signal_depth         = 0;
+thread_local _Atomic static volatile sig_atomic_t software_interrupt_SIGALRM_kernel_count = 0;
+thread_local _Atomic static volatile sig_atomic_t software_interrupt_SIGALRM_thread_count = 0;
+thread_local _Atomic static volatile sig_atomic_t software_interrupt_SIGUSR_count         = 0;
+thread_local _Atomic volatile sig_atomic_t        software_interrupt_deferred_sigalrm     = 0;
+thread_local _Atomic volatile sig_atomic_t        software_interrupt_signal_depth         = 0;
 
 _Atomic volatile sig_atomic_t *software_interrupt_deferred_sigalrm_max;
 

runtime/src/worker_thread.c

@@ -4,6 +4,7 @@
 #include <signal.h>
 #include <sched.h>
 #include <stdlib.h>
+#include <threads.h>
 
 #include "current_sandbox.h"
 #include "local_completion_queue.h"
@@ -21,12 +22,12 @@
  **************************/
 
 /* context of the runtime thread before running sandboxes or to resume its "main". */
-__thread struct arch_context worker_thread_base_context;
+thread_local struct arch_context worker_thread_base_context;
 
-__thread int worker_thread_epoll_file_descriptor;
+thread_local int worker_thread_epoll_file_descriptor;
 
 /* Used to index into global arguments and deadlines arrays */
-__thread int worker_thread_idx;
+thread_local int worker_thread_idx;
 
 /***********************
  * Worker Thread Logic *